There are a lot of independent labs anymore - PA Labs is one of the larger..... you may just request tests and pay for them yourself....Sad is right in telling you that you are most likely OK - but for your peace of mind you could have labs run...
there is no way to tell if your liver is damaged that i am aware of without a simple blood test..Do you get your vicodin prescribed to you? if so your dr. should be testing you every three months anyway..there is nothing to be scared of by asking your dr to do the blood test..you could simply tell them that you take alot of acetominephine..(tylenol)..chances are you are ok..this is a common concern for many .